#!/usr/bin/env python
# -*- coding: utf-8 -*-
# vim: autoindent shiftwidth=4 expandtab textwidth=80 tabstop=4 softtabstop=4

###############################################################################
# OpenLP - Open Source Lyrics Projection                                      #
# --------------------------------------------------------------------------- #
# Copyright (c) 2008-2010 Raoul Snyman                                        #
# Portions copyright (c) 2008-2010 Tim Bentley, Jonathan Corwin, Michael      #
# Gorven, Scott Guerrieri, Christian Richter, Maikel Stuivenberg, Martin      #
# Thompson, Jon Tibble, Carsten Tinggaard                                     #
# --------------------------------------------------------------------------- #
# This program is free software; you can redistribute it and/or modify it     #
# under the terms of the GNU General Public License as published by the Free  #
# Software Foundation; version 2 of the License.                              #
#                                                                             #
# This program is distributed in the hope that it will be useful, but WITHOUT #
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or       #
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for    #
# more details.                                                               #
#                                                                             #
# You should have received a copy of the GNU General Public License along     #
# with this program; if not, write to the Free Software Foundation, Inc., 59  #
# Temple Place, Suite 330, Boston, MA 02111-1307 USA                          #
###############################################################################

import os
from cgi import escape
from ast import parse, NodeVisitor, Str

ts_file = u"""<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE TS>
<TS version="1.1">
%s
</TS>
"""
ts_context = u"""  <context>
    <name>%s</name>
%s  </context>
"""
ts_message = u"""    <message>
      <location filename="%s" line="%d"/>
      <source>%s</source>
      <translation type="unfinished"></translation>
    </message>
"""

class StringExtractor(NodeVisitor):

    def __init__(self, strings, filename, base_path):
        self.base_path = base_path
        self.filename = filename
        self.strings = strings
        self.classname = 'unknown'

    def visit_ClassDef(self, node):
        self.classname = node.name
        self.generic_visit(node)

    def visit_Call(self, node):
        if hasattr(node.func, 'attr') and node.func.attr == 'trUtf8' and isinstance(node.args[0], Str):
            string = node.args[0].s
            key = '%s-%s' % (self.classname, string)
            self.strings[key] = [self.classname, self.filename[len(self.base_path) + 1:], node.lineno, escape(string)]
        self.generic_visit(node)

def parse_file(base_path, filename, strings):
    file = open(filename, u'r')
    try:
        ast = parse(file.read())
    except SyntaxError, e:
        print "Unable to parse %s: %s" % (filename, e)
        return
    file.close()

    StringExtractor(strings, filename, base_path).visit(ast)

def write_file(filename, strings):
    translation_file = u''
    translation_contexts = []
    translation_messages = []
    class_name = strings[strings.keys()[0]][0]
    current_context = u''
    for key, translation in strings.iteritems():
        if class_name != translation[0]:
            current_context = ts_context % (class_name, u''.join(translation_messages))
            translation_contexts.append(current_context)
            translation_messages = []
            class_name = translation[0]
        translation_messages.append(ts_message % (translation[1], translation[2], translation[3]))
    current_context = ts_context % (class_name, u''.join(translation_messages))
    translation_contexts.append(current_context)
    translation_file = ts_file % (u''.join(translation_contexts))
    file = open(filename, u'w')
    file.write(translation_file.encode('utf8'))
    file.close()

def main():
    strings = {}
    start_dir = os.path.abspath(u'..')
    for root, dirs, files in os.walk(start_dir):
        for file in files:
            if file.startswith(u'hook-') or file.startswith(u'test_'):
               continue
            if file.endswith(u'.py'):
                print u'Parsing "%s"' % file
                parse_file(start_dir, os.path.join(root, file), strings)
    print u'Generating TS file...',
    write_file(os.path.join(start_dir, u'resources', u'i18n', u'openlp_en.ts'), strings)
    print u'done.'

if __name__ == u'__main__':
    if os.path.split(os.path.abspath(u'.'))[1] != u'scripts':
        print u'You need to run this script from the scripts directory.'
    else:
        main()